Roberto's Queen sio pao is not only known to be a big sized sio pao with more than the usual filling ( it has bacon and Chinese sausage on top of the usual chicken-pork adobo combination and hard boiled egg.) It also takes a deal of good luck to get one since it is only available for 3 days a month. Yes, only 3 days a month - you miss the exact dates then you'll have to wait for almost a month. So it's always recommended to call them before venturing out to taste the "Queen" or you'll end up with the "King". It has ham instead of bacon and the rest are the same yet this one's much smaller.
And I did call Roberto's today to inquire more than "when it is available next month?". It was actually for the upcoming bloggers meet. Not for sponsorship (but we'll try-lol) but to ask if the "Queen" can be made to order. And "Roberta" said yes if one orders a minimum of 30 pieces and must call 2-3 days ahead for them to prepare the ingredients especially the bacon.